Plutino

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This word is not acceptable for play in the US & UK dictionaries that are being used in the following games:

Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. Any of several planetoids in the Kuiper Belt that have orbits similar to Pluto in that they have a resonance of 3:2 with that of Neptune
  • Word Usage
    "Just to further muddy the waters: there is already the term “plutino,” which refers to Kuiper Belt Objects which have orbits similar to Pluto’s that is, in the same 3:2 resonance with Neptune’s orbit."